New guidance from the Office of Personnel Management on Wednesday is unambiguous and stern. Federal workforce rules remain unchanged for the roughly 4.1 million federal employees and military personnel across the U.S. The feds still consider marijuana an illegal drug, and possessing or using it is a crime.

“Heads of agencies are expected to advise their workforce that legislative changes by some states and the District of Columbia do not alter federal law, existing suitability criteria or Executive Branch policies regarding marijuana,” OPM Director Katherine Archuleta wrote in a memo posted on the agency Web site.